Rao, K. Ranganatha, author
Prentice Hall of India, 1980
Buku Teks
Ottaway, J. H.
English Language Book Society and Bailliere Tindall, 1984
Buku Teks
Colby, Diane S., author
EGC, 1988
Buku Teks
Robert K. Murray...[et al.]; alih bahasa Andry Hartono
EGC, 1995
Buku Teks
Voet, Donald, author
John Wiley & Sons, 2004
Buku Teks